<template>
  <div>
    <h1>当前求和为：{{ $store.state.sum }}</h1>
    <h2>10倍求和为：{{ $store.getters.bigSum }}</h2>
    <select v-model.number="n">
      <option value="1">1</option>
      <option value="2">2</option>
      <option value="3">3</option>
    </select>
    <button @click="increment">+</button>
    <button @click="decrement">-</button>
    <button @click="incrementOdd">当前求和为奇数再加</button>
    <button @click="incrementWait">等一等再加</button>
  </div>
</template>

<script>
// import {mapState,mapGetters} from "vuex";
export default {
  name: "Count",
  data() {
    return {
      n: 1, //用户选择的数字
    };
  },
  computed: {
    //靠程序员自己亲自去写计算属性
    /* sum(){
				return this.$store.state.sum
			},
			school(){
				return this.$store.state.school
			},
			subject(){
				return this.$store.state.subject
			}, */

    //借助mapState生成计算属性，从state中读取数据。（对象写法）
    // ...mapState({he:'sum',xuexiao:'school',xueke:'subject'}),

    //借助mapState生成计算属性，从state中读取数据。（数组写法）
    ...mapState(["sum", "school", "subject"]),

    /* ******************************************************************** */

    /* bigSum(){
				return this.$store.getters.bigSum
			}, */

    //借助mapGetters生成计算属性，从getters中读取数据。（对象写法）
    // ...mapGetters({bigSum:'bigSum'})

    //借助mapGetters生成计算属性，从getters中读取数据。（数组写法）
    ...mapGetters(["bigSum"]),
  },
  methods: {
    increment() {
      this.$store.commit("JIA", this.n);
    },
    decrement() {
      this.$store.commit("JIAN", this.n);
    },
    incrementOdd() {
      this.$store.dispatch("jiaOdd", this.n);
    },
    incrementWait() {
      this.$store.dispatch("jiaWait", this.n);
    },
    //借助mapMutations生成对应的方法，方法中会调用commit去联系mutations(对象写法)
    ...mapMutations({ increment: "JIA", decrement: "JIAN" }),

    //借助mapMutations生成对应的方法，方法中会调用commit去联系mutations(数组写法)
    // ...mapMutations(['JIA','JIAN']),

    /* ************************************************* */

    //程序员亲自写方法
    /* incrementOdd(){
				this.$store.dispatch('jiaOdd',this.n)
			},
			incrementWait(){
				this.$store.dispatch('jiaWait',this.n)
			}, */

    //借助mapActions生成对应的方法，方法中会调用dispatch去联系actions(对象写法)
    ...mapActions({ incrementOdd: "jiaOdd", incrementWait: "jiaWait" }),

    //借助mapActions生成对应的方法，方法中会调用dispatch去联系actions(数组写法)
    // ...mapActions(['jiaOdd','jiaWait'])
  },
  mounted() {
    console.log("Count", this);
  },
};
</script>

<style lang="css">
button {
  margin-left: 5px;
}
</style>
